(n.) A rigid piece which is capable of turning about one point, or axis (the fulcrum), and in which are two or more other points where forces are applied; -- used for transmitting and modifying force and motion. Specif., a bar of metal, wood, or other rigid substance, used to exert a pressure, or sustain a weight, at one point of its length, by receiving a force or power at a second, and turning at a third on a fixed point called a fulcrum. It is usually named as the first of the six mechanical powers, and is of three kinds, according as either the fulcrum F, the weight W, or the power P, respectively, is situated between the other two, as in the figures.
(n.) A bar, as a capstan bar, applied to a rotatory piece to turn it.
(n.) An arm on a rock shaft, to give motion to the shaft or to obtain motion from it.
Example Sentences:
(1) In this experiment animals were trained to lever press in two distinctive contexts.
(2) Orientation and lever responding were not functionally related.
(3) In older stages, the cervical joints rotate according to geometric and lever arm principles.
(4) In EastEnders , the mystery surrounding the identity of Kat's secret squeeze continues amid the grinding of narrative levers and the death rattle of overflogged script-horses.
(5) Cats were trained to press a lever for 0.5--1.0 ml of milk reward both in the presence and absence of ambient light.
(6) Setting out how Britain would have a lever over the rest of the EU to demand repatriation of UK competences, Cameron said: "What's happening in Europe right now is massive change being driven by the existence of the euro.
(7) When lever pressing was established, the 2-kHz signal was presented through a speaker adjacent to the response lever according to a different set of variable intertrial intervals.
(8) Officials said the changes to the planning rules will mean it is possible to lever in billions of private sector development in low-cost housing.
(9) Rats were allowed to bar press on either of two levers (left and right).
(10) Knee flexion is synchronized with ankle dorsiflexion by a synchronizer rod and lever.
(11) In order to study the interactions between serotonergic mechanism and electrical stimulation of the mesencephalic central gray substance, rats were trained to lever-press for terminating aversive electric stimuli applied at the Periaqueductal gray and adjoining tectum of the mesencephalon.
(12) Rats were trained to press a lever to obtain a brief burst of pulses to the lateral hypothalamus.
(13) But its original meaning is the practice of using the levers of the state and of government to get difficult things done that otherwise wouldn't happen.
(14) Intact rats and rats bearing lesions of the suprachiasmatic nuclei (SCNX rats) were trained to obtain food by pressing either of two levers located on opposite sides of a cylindrical cage.
(15) We found that attenuation of lever-pressing and water intake by raclopride were not more separated in dose than after, for example, haloperidol.
(16) Young rats weaned at 16 days were taught to press a lever by shaping at 18 days and trained for 11 days (from 20 to 30 days of age) on a fixed-interval 60-sec schedule, at a rate of 5 half-hour sessions per day.
(17) In contrast, the selective norepinephrine uptake inhibitors, desipramine and talsupram, and the selective serotonin uptake inhibitor, citalopram, occasioned averages of only 13 to 19% drug-lever responding.
(18) When reinforcement was not available, each lever response produced a 0.5-sec green light on the key.
(19) Rats implanted with placebo pellets and given access to morphine reestablished lever pressing, while those given access to isotonic saline extinguished their lever pressing.
(20) Levels of acetylcholine were significantly elevated in the telencephalon and diencephalon + mesencephalon of rats killed by near-freezing during conditioned suppression of food-reinforced lever pressing, whereas levels of serotonin, dopamine, and norepinephrine were not altered.
Purchase
Definition:
(v. t.) To pursue and obtain; to acquire by seeking; to gain, obtain, or acquire.
(v. t.) To obtain by paying money or its equivalent; to buy for a price; as, to purchase land, or a house.
(v. t.) To obtain by any outlay, as of labor, danger, or sacrifice, etc.; as, to purchase favor with flattery.
(v. t.) To expiate by a fine or forfeit.
(v. t.) To acquire by any means except descent or inheritance.
(v. t.) To buy for a price.
(v. t.) To apply to (anything) a device for obtaining a mechanical advantage; to get a purchase upon, or apply a purchase to; as, to purchase a cannon.
(v. i.) To put forth effort to obtain anything; to strive; to exert one's self.
(v. i.) To acquire wealth or property.
(v. t.) The act of seeking, getting, or obtaining anything.
(v. t.) The act of seeking and acquiring property.
(v. t.) The acquisition of title to, or properly in, anything for a price; buying for money or its equivalent.
(v. t.) That which is obtained, got, or acquired, in any manner, honestly or dishonestly; property; possession; acquisition.
(v. t.) That which is obtained for a price in money or its equivalent.
(v. t.) Any mechanical hold, or advantage, applied to the raising or removing of heavy bodies, as by a lever, a tackle, capstan, and the like; also, the apparatus, tackle, or device by which the advantage is gained.
(v. t.) Acquisition of lands or tenements by other means than descent or inheritance, namely, by one's own act or agreement.
Example Sentences:
(1) Britain had been negotiating with the Saudis over the purchase from British Aerospace of dozens of Hawk and Tornado fighter aircraft.
(2) The Sports Network broadcasts live NHL, Nascar, golf and horse racing – having also recently purchased the rights for Formula One – and will show 154 of the 196 games that NBC will cover.
(3) This study sought to determine if and why barriers to the over-the-counter purchase of syringes in the St. Louis metropolitan area might exist, given that no ordinance prohibits such a sale there.
(4) The government’s increase in the discount offered to tenants has prompted a massive increase in purchases of local authority accommodation.
(5) Following baseline, training consisted of teaching students to use a number line to make purchases.
(6) In the first experiment, mongrel and ddS mice produced under an unsatisfactory control of proximate environment were purchased, and acute toxicity tests of thiamine hydrochloride (B1HCl) and isonicotinic acid hydrazide (INAH) were practiced at two different conditioned rooms.
(7) Our fundamental market is 75% done,” he said last weekend, “and when we sign one midfield player that crucial work will be done.” The manager did not rule out further purchases, though.
(8) After a brief review of the range of monitoring accessories, the author considers the problem of their hospital standardization (various needs of the different hospital units, diversity of the monitors, existence of central purchasing departments, pressure from the treasurer's office).
(9) As well as stocking second-hand items for purchase, charity shops such as Oxfam have launched Christmas gifts to provide specific help for poor communities abroad.
(10) Like many young Chinese, Hua often made purchases on Taobao, the country’s equivalent of eBay.
(11) Howard Archer of consultancy IHS Global Insight said: "Given the dominant role of the services sector in the economy, the steady growth in May reported by the purchasing managers is welcome news and supports hopes that it can avoid further contraction in the second quarter."
(12) The CML said the value of lending for house purchases was up by 8% year on year in May, at £9.4bn, while the number of loans grew by 5% to 53,800.
(13) Tesco uniforms can be bought through the supermarket's Clubcard Boost scheme, where £5 in Clubcard vouchers equals a £10 spend on clothing, while Asda is offering free delivery on uniform purchases of over £25.
(14) It's possible to go out and about, and not talk to anybody apart from the person you purchase goods from."
(15) The company is also making its VR games collection free to all purchasers of its headset.
(16) The FSA last month published a report by Professor Gerard Hastings which concluded that advertising to children does have an effect on their food preferences, purchasing behaviour and consumption, and that these effects occur not just at brand level, but also for different types of food.
(17) That would mark a controversial break from its existing policy, whereby the ECB offsets bond purchases by draining liquidity from the system in separate operations.
(18) The news website is run by journalist Carmen Aristegui, who in 2014 reported that Peña Nieto’s wife was purchasing a house with financing from a government contractor .
(19) For example, if we purchase new examination equipment without any consideration or if we decide what type of equipment to introduce according to the common advice of the purchase committee of the hospital or the medical school, then we cannot design an ideal system of laboratory examinations and are forced to invest a large sum of money in vain.
(20) The euro clawed back some losses after the European Central Bank said it would absorb €16.5bn from the money markets to compensate for bond purchases up to 14 May, and Greece said it would receive the first tranche of emergency loans tomorrow.